NPort 5100A Series Configuring NPort Administrator
4. The NPort 5100A list that appears is the list generated by the previous Broadcast Search. Select the NPort
5100A to which you would like to map COM ports.
5. Select COM Settings to modify COM No., default setting, etc.
6. Select the COM Number.
COM ports that are “In use” or “Assigned” will also be indicated in this drop-down list. If you select multiple
serial ports or multiple NPort 5100As, remember to check the “Auto Enumerating” function to use the COM
No. you select as the first COM No.
7. Hi-performance mode is the default for Tx mode. If the driver completes sending data out to the NPort
5100A, the driver will respond “Tx Empty” to the program.
Under classical mode, the driver will not notify the user’s program that Tx is completed until all Tx data
has been sent out from the NPort 5100A; this mode will cause lower throughput. If you want to ensure that
all data is sent out before further processing, classical mode is recommended.
Enable/Disable Tx/Rx FIFO. If disabled, the NPort 5100A will send one byte each time the Tx FIFO
becomes empty; and an Rx interrupt will be generated for each incoming byte. This will result in a faster
response and lower throughput. If you want to use XON/XOFF flow control, we recommend setting FIFO to
Disable.
Fast Flush (only flush local buffer)
• We have added one optional Fast Flush function to Moxa’s new NPort Real COM driver. Starting from
version 1.2, NPort Administrator Suite for NPort supports Fast Flush.
• For some applications, the user’s program will use the Win32 “PurgeComm()” function before it reads or
writes data. With our design, after the program uses this Purge Comm() function, the NPort driver will
keep querying the NPort’s firmware several times to make sure there is really no data queued in the
NPort firmware buffer, rather than just flushing the local buffer. This kind of design is used because of
some special considerations. However, it might take more time (on the order of several hundred
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